Domestic heating boiler



March 31, 1953 R. w. BOARMAN DOMESTIC HEATING BOILER Filed March 1. 1952 FIG.2

INVENTOR.

ATTORNEY.

ROBERT w. BOARMAN FIG. 4

Patented Mar. 31, 1953 .l Ruberi: .I-Boarman, LPottstovm, Pa, lassi'gnorlto #Dnlumhia JBoiler seompany, zl ottstown, 3a., Ia.

=14 JGlaims.

ET-his invention :relates so mom 'fi e boilers. 7

variou designsfilm-ewe heretofore gaar'opiosed after iiomestioheating ib'oilers. :Most of those mow avai-lable are irelatively expensive because of the eomple'x ity o'f the :design "with lattendantihigh rexfeen'se of material, vfabricatitm and assembliy, aor :ifor'dther reasons.

itn aeoor'clance with "the :present finve'ntion "a tlomestle heatmg boileriisiprovidedwhichi ,ple in construction, which maybe readily ifabrl-i matei iby-meliinre anti which :is effective :foriheat transfer.

V 'irn aecordance with the quresent invention, also,

-a eltled adom'estic iheating :boiler :is provided wmoh is "particularly zadapted 'iorlluse lwithffiuent firuerandspecificallyoil areas. I

' In accordance with the present invention, also, a. welded domestic heating boiler is provided which :zrlequires :a minimum amount for material (compared with the heat .output, which is oom- "pact, winch i-may ibe readily mleaned, and which is of adequate strength and durability.

' 2m ,aeeordanne with the:presentinvention, also,

a domestic ihe'ating FbO ileri is w provid'edrhaving a-lsimpl'e but effective hams-arrangement.

Other objects and advantageous features of the present invention will .be apparent from ithe specification and claims.

mature and c-haracteristic feature 'of the --inventionwi1l'hereadily understood 'tromthe ifoblolwing ''de'seription, .taken in i'connection with the accompanying vdrawings iormin ".p'art her-e01, sin "whioh-z.

Figuremiszawertiealicentrallsectional'viewzof homes tie rheatin'g :boi-ler in accordance with :the invention and taken approximately on the :line

mfiFi'gi L'Flg. :2 :is :a horizontal .lsectional wiew taken iapproximately on thesline 2-2 'o'fjFig. 1': 3 :a "vertical sectional wiew Ltaken sapqaroximately on the line 33 'of Fig. 21:; :and

Ei'g. A: is :a :fragmen'tary plan View, enlarged, 50f ia 'portionxffone of the ba'flies.

;It-?shou1d, of course, be "understood that the :description and drawing herein are illustrative merely, and that various modifications and changes snayrbe made ::in the st'ructm'e disclosed without departing "from the -spirit 301' the :invention.

Referring now more particularly to the draw-- ings, in which 1a rpreferred embodiment of the einvention is illustrated, an outer "oylindrica1 0975- ;ing All with :a suitable insulating covering mot shown) is tuarovided, :of sheet :steel, with its :lon-

:gitudinall axis wertical, one havin spaeetl upwardly ifrom "the lower :edg'e thereof, :a horizon ltillower'filate l -'l o'flsheet steel. CUhe plate final is preferably weliied tb :the "interio'r wall of the easing lll by a welii l2 exteml ing along the junction of the filate M and the easing f0, and Tbe'loW the plate in, to iprov-ide-a is'trong and fluid tight joitit aitthis location.

In the 's' aeeeetween the l'owerzirate PH @anuthe slower iehge for the "casing :l ll, a firebox ifs is :ipro- -vided, open at the too, With a :loottorn wall is i and ran upwardly extending Si'de Wall is round-- iffg a :conibustionfchamber 1$, oesireulnfeat resistant material, such asipreformed or molded eeramic or line fbrick composition, mawibeiem :ployediortheffireboz: Is.

The side wall 1M and the easing 11: are pro- "v-ii'le'd. with a1bi1rner 0peni-ng11 :for the reception of :a fuel lburner .tnotshomm) or the -desired type Sand .in aecoriiarroe with :the sp'eeifie iuel tom-'- nloyerl.

Spaced upwardly ifrom' the lhorizontal llllate Ali! and ":below the upper edgeof the easing in, an upper horizontal :plate is, or :sheet :steel is provided.

.Ihe :plate It is :pre'fera-bly welded :to "the in- :teriorwwall of the casing 1:0 by a'weld 19 extendiing along the junction ofthe plate 13 and the -casing =11), and above "the jlpl'ate J 8, to iplovi'de a strong and. fluid tight joint at this location.

ifrhezlower :plate r"! [is tprovided with fan farcuate slot 2n, :the euwed edges of which are preferiably concentric, with their centers in the wertical i'sl'ongitudinal axis soil gthe casing Ilia, and the #strai'ghtrend'iedeessorswhieh arerpre'fer'amy radial.

ittth'e unper'spleite-dfl is provided withe ot-M ml? the :same size, shape and comperabie rl'oeation as the'slot 211. It will :benoted thatthe burner opening I! is at ithe enpositefsid'e-fof the :CaSi n'g 1o, although :on :a lower level, 'ifrom that at which the-straight tend edges 'of thefi'slots 20 -andl2 l are located.

.EXtending "between "and b'eyond the lower "and upper plates ll and 18, an outer :arcuate sheet steel ,iplate '25 is provided, joined at its junction with the :lowernlated .1 along the outer-margin of the slot 1-9 hy aweld "2 6 'exten'dingralon'g'the junction with the lower plate ll along the inner margin of the slot l9 by a weld 23 extending along the junction and joined at its junction with the upper plate l8 along the inner margin of the slot 28 by a weld 38 extending along the latter junction. The welds 29 and 38 provide strong and fluid tight joints at their respective locations.

Extending between and beyond the lower and upper plates II and 8, also, and meeting the vertical ends of the outer and inner arcuate.

sheets 25 and 28, fiat vertical end plates 32 are provided, of sheet steel. The plates 32 are respectively joined to the sheets 25 and 28 at the ends of the slots l9 and 20 by welds 33 and 34 extending along their respective junctions, and are welded to the lower and upper plates and I8 by welds 35 and 36. and 36 provide strong and fluid tight joints at their respective locations.

It will be-noted that the space between the arcuate sheets 25 and 28 and bounded by the end plates 32 provides a gas passageway 3| for ases from the combustion chamber to a space 31, above the upper plate A top closure 38 is provided and is held in place, and in engagement with the upper edge of the casing H), by nuts 39 on studs 40. The studs 40 can be welded to the top face of the plate I The closure 38 is preferably provided with a collar or flange 4| for the reception of a smoke pipe 42 for connection to the stack (not shown).

Interposed between the top and the bottom of the gas passageway 3|, bafiles are provided. While any suitable form of bafiling may be emplayed it is preferred to use arcuate strips of two kinds, one, which may be referred to as the longer being shown at 43, and the other which may be referred to as the shorter being shown at 44. The strip 43, as will be seen in Fig. 4, is horizontally disposed and extends around an are greater than 180 and is located approximately at the lower third point in the passageway 3| between the lower and upper plates and I8, and extends around in the gas passageway 3| in each direction from above the burner opening H. The other strips 44, are also horizontally disposed and extend from the walls 32 through an arc of approximately 90", are located approximately at the upper third point in the passageway 3| between the lower and upper plates H and I8, and accordingly are disposed so that their ends overlap the ends of the baflle strip 43 although in different horizontal planes.

The baffie strips 43 and 44 are removably supported in the gas passageway 3| in any desired manner'and for this purpose chains 45 of the desired length and carried on straddle bars 46 are preferably employed.

It has been determined in practice that for a gas passageway of the order of one inch across, and of the order of 24 inches high, the heat absorption and gas flow are most effective if the baflies are provided with a plurality of holes or perforations 41. Such holes may be varied in size, but inch drilled holes spaced about three quarters of an inch or an inch apart are satisfactory.

It will be noted that the water space of the boiler, between the lower and upper plates II and 8 includes an outer space between the outer arcuate sheet 25 and the casing l8 and an in.- ner space within the inner arcuate sheet 28, with a connection for the inner and outer spaces between the ends of the plates 32.

The welds 33, 34, 35

At any desired location on the casing [0, but preferably in alinement with the connecting water space between the plates 32, a cold water inlet connection 48 and a hot water outlet connection 49 are provided.

Alined with the connecting water space between the plate 32, also, an access opening 50 is provided, and closed by an arcuate access plate 5| which is secured to the casing II) in any desired manner, such as by nuts 52 on studs 53.

Y The access plate 5| permits of access to the interior of the water space for cleaning, may also be provided with an immersion type water heating coil 54 for supplying hot water for domestic consumption, and if desired may carry immersion type temperature responsive control units (not shown).

Clean out or drain plugs 55 are also provided in the wall of the casing l0 just above the lower plate ll.

The'mode of operation should be clear from the foregoing, but will be summarized briefly.

The hot gases of combustion supplied by the burning in the combustion chamber I6 of fuel, introduced by the burner (not shown) in the burner opening [1, pass upwardly in the combustion chamber I8 where they enter the gas passageway 3| and move upwardly around and partially through the baffle plates 43 and 44 and in heat exchange relative to the plates 25, 28 and 32.

The heat of the combustion in the combustion chamber I6 is also effective on the lower plate I The gases of combustion, upon the completion of their upward movement in the gas passageway 3|, move into the gas space 3'! for discharge through the smoke pipe 42. The hot gases are also in heat exchange relation to the upper plate I8.

The water to be heated enters through the inlet pipe 48 to the interior water space heretofore referred to and is available at the delivery pipe 49.

It will be noted that the interior spaces, both for water and hot gases, are readily'accessible for inspection and for cleaning if desired.

I claim:

1. A domestic heating boiler comprising a vertical cylindrical casing, upper and lower plates secured at their peripheries to said casing at spaced locations in fluid tight relation, spaced arcuate plates extending vertically between and beyond said upper and lower plates and having their ends arcuately spaced, the arcuate space between said plates being open below and above said lower and upper plates to provide a gas passageway for hot gases of combustion, and a plurality of arcuate perforated baflle plates horizontally disposed in suspended relation in the space between said arcuate plates at different levels.

2. A domestic heating boiler comprising a vertical cylindrical casing, upper and lower plates secured at their peripheries to said casing at spaced locations in fluid tight relation, spaced concentric arcuate plates extending vertically between and beyond said upper and lower plates and having their ends spaced, vertical members for connecting the ends of said arcuate plates extending beyond said upper and lower plates, the portions of said arcuate plates and vertical members providing exposed sections for securing to said upper and lower plates, the arcuate space between said plates and said members being open below and above said lower and upper plates to provide a gas passageway for hot gases of combustion and arcuate perforated baffle plates horizontally disposed in the space between said arcuate plates at different levels, the bafile plates at one level extending in said space from said vertical members, and the baflie plate at another level spanning an intermediate portion of said arcuate space.

3. A domestic heating boiler comprising a vertical cylindrical casing, an upper horizontal plate spaced downwardly from the upper end of said casing and secured at its periphery to said casing in fiuid tight relation, a lower horizontal plate intermediate the top and bottom ends of said casing and secured at its periphery to said casing in fluid. tight relation, the space below said lower horizontal plate having a firebox therein open at the top'and in communication with thelower face of said lower plate, each of said horizontal plates having alined arcuate slots concentric with the vertical axis of the casing, spaced arcuate plates extending between and beyond said horizontal plates and secured thereto at the margins of said slots and exteriorly to said horizontal plates in fluid tight relation and providing therebetween an arcuate gas passageway in communication at the bottom with the firebox and at the top with the space above the upper horizontal plate and providing; water spaces in the interior of said casing, and a plurality of perforated arcuate baffle plates disposed in suspended relation intermediate the top and bottom of said arcuate passageway at different levels.

4. A domestic heating boiler comprising a vertical cylindrical casing, an upper horizontal plate spaced downwardly from the upper end of said casing and secured at its periphery to said casing in fluid tight relation, 9, lower horizontal plate intermediate the top and bottom ends of said casing and secured at its periphery to said casing in fluid tight relation, the space below said lower horizontal plate having a firebox therein open at the top and in communication with the lower face of said lower plate, each of said horizontal plates having alined arcuate slots concentric with the vertical axis of the casing, spaced arcuate plates extending between and beyond said horizontal plates and secured thereto exteriorly thereof at the margins of said slots in fluid tight relation, a connecting plate member connected to said arcuate plates and to said horizontal plates in fluid tight relation providing with and between said arcuate plates an arcuate gas passageway in communication at the bottom with the firebox and at the top with the space above the upper horizontal plate and providing water spaces in the interior of said casing, pendant members supported at the upper end of said arcuate gas passageway, a perforated arcuate baille plate carried by said pendant members and horlzontally disposed intermediate the top and bottom of said arcuate passageway at one level and spanning a portion of the arcuate passageway, and perforated arcuate baflle plates carried by said pendant members and horizontally disposed intermediate the top and bottom of said arcuate, passageway at another level and spanning different portions of said arcuate passageway and in overlapping relation to the ends of said first mentioned baflle plate.

ROBERT W. BOARMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,417,888 Dearing May 30, 1922 1,697,015 Majuga Jan. 1, 1929 2,210,830 Bernhard Aug. 6, 1940 

